Vyacheslav Egorov
a41a1dc917
Make them form its own source set (libdart_compiler) and completely exclude them from AOT runtime targets. Previously we had some inconsistencies, with some files were using DART_PRECOMPILED_RUNTIME to fully or partially exclude either contents from their headers or from implementation, while other files did nothing and relied on linker to throw their contents away. This change tries to address this inconsistency. A follow up change would include a check in most compiler headers which would prohibit to use them while building AOT runtime. Change-Id: Ief11b11cbc518b301d3e93fce80580a31bbad151 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142993 Reviewed-by: Alexander Markov <alexmarkov@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_COMPILER_API_DEOPT_ID_H_
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#define RUNTIME_VM_COMPILER_API_DEOPT_ID_H_
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#include "platform/allocation.h"
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namespace dart {
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// Deoptimization Id logic.
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//
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// Deoptimization ids are used to refer to deoptimization points, at which
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// control can enter unoptimized code from the optimized version of the code.
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//
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// Note: any instruction that does a call has two deoptimization points,
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// one before the call and one after the call - so that we could deoptimize
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// to either before or after the call depending on whether the same call
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// already occured in the optimized code (and potentially produced
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// observable side-effects) or not.
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//
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// To simplify implementation we always allocate two deopt ids (one for before
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// point and one for the after point).
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class DeoptId : public AllStatic {
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public:
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static constexpr intptr_t kNone = -1;
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static inline intptr_t Next(intptr_t deopt_id) { return deopt_id + kStep; }
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static inline intptr_t ToDeoptAfter(intptr_t deopt_id) {
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ASSERT(IsDeoptBefore(deopt_id));
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return deopt_id + kAfterOffset;
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}
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static inline bool IsDeoptBefore(intptr_t deopt_id) {
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return (deopt_id % kStep) == kBeforeOffset;
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}
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static inline bool IsDeoptAfter(intptr_t deopt_id) {
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return (deopt_id % kStep) == kAfterOffset;
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}
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private:
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static constexpr intptr_t kStep = 2;
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static constexpr intptr_t kBeforeOffset = 0;
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static constexpr intptr_t kAfterOffset = 1;
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};
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} // namespace dart
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#endif // RUNTIME_VM_COMPILER_API_DEOPT_ID_H_
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